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there are alot of things to consider
what kind of mods do you have
what kind of conditions do the knocking and pinging happen at
what kind of gas do you put
how long has it been doing this
do you have a cel

I notice that my MY00 pings quite a bit when the weather is hot and I'm crusin up a slight incline. It's definetly related to the weather - since the weather has cooled off here in Vancouver, the pinging is almost nonexistent.

The gas I've been using is the costco stuff, 91. Don't laugh. Their gas is actually not bad at all. And plus, they go through so much of it that it's always fresh, and they change out the pump filters more often. Besides, I always see MB, BMW, and Audis there (all new models).

In terms of mods, just an intake and exhaust, grounding mod, (the rest is just handling stuff). I thought the weather might have somthing to do with it, but it hasn't been all that hot lately.

There was no load on the car except me. 1/4 throttle. Sometime it shows up under full throttle. Wierd.
Well, come next week I plan on tearing everything apart, as my new struts are coming in, and fluids, and plugs. Speaking of which, last time I used Redline all around, but I forgot the quantities we need for front tranny and rear lsd. Doh!

If your plug wires are decomposing, they'll deliver less energy to the spark plugs, which will therefore produce a weaker spark. New plug wires = more spark energy = better combustion. This may or may not help pinging.

''no automatic's do not have a throw out bearing, instead of a clutch/flywheel they have a torque converter(fluid coupling), now the torque converter does has torrington/roller bearings inside of it." -drummerRS2505

Because many have experienced pinging problems caused by bad spark plug wires. One cylinder (maybe more) would misfire, causing the ECU to detect a rich condition, and lean out the mixture to the other cylinders, causing the engine to ping. Look for open wires, intermittent wires, and leaking wires.